drm/amdgpu: add baco support to runtime suspend/resume

BACO - Bus Active, Chip Off

This adds the necessary support to the runtime suspend
and resume functions to handle boards that support
baco.

Reviewed-by: Evan Quan <evan.quan@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
1 file changed